KR200217301Y1 - Repeater for internet phone - Google Patents

Abstract

The present invention relates to a telephone capable of making an internet telephone call, comprising: handset means comprising a handset for converting a voice signal into a first electrical signal and a handset for converting a second electrical signal into an audible signal; An apparatus for use in an internet telephony service system comprising: a sound card of a computer including a wave device for converting an analog signal and a digital signal to each other while the first electric signal and the second electric signal are passed. A first input terminal of a handset connecting means for receiving the first electrical signal; A first output terminal of the computer connection port electrically connected to the first input terminal; A transmission microphone amplifier for amplifying the first electrical signal from the first output terminal and outputting the amplified signal to the computer connection port; A second input terminal of a computer connection port through which the second electrical signal is received: a second output terminal of a handset input terminal electrically connected to the second input terminal; A reception audio amplifier configured to amplify the second electrical signal from the second input terminal and output the amplified second signal to the second output terminal; It provides an Internet phone repeater including a band filter assembly for passing a predetermined band frequency between the second input terminal and the receiving audio amplifier, and reduces the noise such as howling by reducing the feedback phenomenon during the Internet phone call There is an advantage to this.

Description

Internet phone repeater {Repeater for internet phone}

The present invention relates to a telephone capable of making an internet telephone call, and more particularly, to an internet telephone repeater of a telephone.

In the related art, a public switched telephone network (PSTN: hereinafter referred to as a 'general telephone network') has been used to talk to a remote party who is remote.

However, with the recent development of computer and communication technology and popularization of the Internet, it is possible to make Internet phone calls using a computer or a regular telephone using an Internet phone.

Internet phone call refers to a technology in which a voice call is made between users by converting a voice signal into a data signal, transmitting data through an internet line, and converting the data signal into a voice signal on the other side. Here, the term 'Internet phone' refers to equipment or software provided to a client side to enable a telephone call through the Internet network.

As such, when making an Internet telephony call, the two parties to the call are connected to the Internet network, respectively, and Internet phone software on each personal computer (PC), for example, NetTalk provided by CoolTalk or Microsoft provided by Netscape. After the operation, etc., the connection is made in accordance with the connection request indication, and a headset (or separate microphone and speaker) is connected to a sound card mounted on the main body as a handset to a computer to talk.

In recent years, companies that provide free Internet phone service have provided free Internet phone service by using advertising revenue from the Internet. Accordingly, the user is allowed to access the Internet address of the corresponding free internet phone service company, enter predetermined information such as a user ID, password, or telephone number, and then make an internet phone call.

FIG. 1A shows a connection diagram of a headset provided for such a conventional Internet telephony call. FIG. 1B is a block diagram for explaining noise generation such as hauling in the sound card of the computer shown in FIG. 1A. to be.

Referring to FIG. 1A, a voice input / output terminal, that is, a microphone input terminal 5 and a speaker output line terminal 6, of a sound card 4 in which a headset 1 is mounted on a computer main body 3 is connected to a wired line 2. Connected.

The headset 1 has a shape that can be fixed to a user's head or ear, and as a handset for converting a voice into an electrical signal, a microphone 7 and a handset 8 for converting and outputting a voice signal into an audible signal are provided. It is constructed integrally.

Such internet phone calls use the Internet network, and in particular, the use of the free Internet phone service has no cost burden for the use of the phone, and thus the use of the Internet phone call has spread.

Nevertheless, since the Internet phone is a phone call using a medium of a computer and the Internet, there is a disadvantage in that a high quality call service as in a general telephone network (PSTN) cannot be expected.

In other words, since the basic design of a sound card used in a general computer is for listening to music, the size or level of the voice signal is not very compatible with the telephone to which communication is required, and an increase in noise and noise during an internet phone call, in particular, There is a problem such as howling occurs.

In this regard, referring to FIGS. 1A and 1B, the user's voice is transmitted to the wave device 10 and the transmitting signal through the microphone input terminal 5 of the sound card 4 connected to the talker 7 of the headset 1. The amplifier 11 is output to the modem. The receiving side signal input through the modem is transmitted to the speaker input terminal 6 of the sound card 4 via the receiving side signal amplifier 12 of the sound card 4 and the wave volume device 10, and the headset. It is output as an audible signal from the handset 8 of (1).

At this time, the wave device 10 converts an analog signal into a digital signal, and when the wave volume of the volume control of the sound card is increased, the sound signal of the transmitter and the receiver voice signal are simultaneously increased in the level control. In (4), howling due to signal feedback occurs.

On the other hand, when making an internet call using a microphone or a speaker as a handset means, the surroundings of the computer become complicated, and furthermore, a headset having an integrated handset and a handset is used so that the user can make a phone call while continuing his or her work by hand. In this case, the connection terminal of the sound card, that is, the microphone input terminal and the speaker output line terminal should be provided, respectively, because of this can not utilize the conventional telephone.

In addition, since a separate general telephone must be provided in order to receive a telephone call through a general telephone network separately from the Internet telephone call, the convenience of using a computer is inferior.

In addition, when connecting to a general speaker to listen to music, there is an inconvenience to change the connection terminal of the headset and the speaker from time to time.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an internet phone relay apparatus that can improve call quality by removing noise such as feedback caused by a feedback phenomenon in a sound card.

In addition, the present invention has another object to provide an Internet phone repeater capable of making an Internet call using a handset of a general telephone.

FIG. 1A is a connection diagram of a headset for making an Internet phone call using a conventional headset. FIG. 1B is a block diagram for explaining noise generation such as howling in the computer sound card shown in FIG. 1A.

2 is a connection diagram when using the Internet phone relay device as an embodiment according to the present invention,

3 is a block diagram of an internet phone relay device according to the present invention of FIG.

FIG. 4 is a block diagram of the noise removing unit of FIG. 3.

<Description of the symbols for the main parts of the drawings>

150. Internet phone repeater 156. Web switch

157. Telephone switch 200. Noise reduction unit

210. Transmitter microphone amplifier 220. Band filter assembly

230. Receiving audio amplifier

In order to achieve the above object, the Internet phone repeater according to an embodiment of the present invention, a transmitter for converting a voice signal into a first electrical signal, and a receiver for converting a second electrical signal into an audible signal Hydration means; An apparatus for use in an internet telephony service system comprising: a sound card of a computer including a wave device for converting an analog signal and a digital signal to each other while the first electric signal and the second electric signal are passed. A first input terminal of a handset connecting means for receiving the first electrical signal; A first output terminal of the computer connection port electrically connected to the first input terminal; A transmission microphone amplifier for amplifying the first electrical signal from the first output terminal and outputting the amplified signal to the computer connection port; A second input terminal of a computer connection port through which the second electrical signal is received: a second output terminal of a handset input terminal electrically connected to the second input terminal; And a receiving audio amplifier for amplifying the second electric signal from the second input terminal and outputting the amplified second signal to the second output terminal.

In this case, when the connection of another Internet phone relay device according to the present invention is used while the wave volume of the computer sound card is reduced, the feedback phenomenon may be reduced to reduce noise such as howling.

In addition, the Internet phone repeater according to the present invention further includes a band filter assembly for passing a predetermined band frequency between the second input terminal and the receiving audio amplifier.

Here, since the computer job input from the computer is removed by the band pass filter assembly, there is an advantage that the call quality can be further improved.

Furthermore, the Internet phone repeater according to the present invention, the volume controller for adjusting the magnitude of the second electric signal passed through the band pass filter assembly; It may further include a loudspeaker switch for increasing the gain of the receiving audio amplifier.

Here, there is an advantage that the call reliability between the telephone call using the volume control and the loudspeaker in the Internet phone call is improved.

Here, the transmitting microphone amplifier is amplified by 3 to 10dB,

The band filter assembly may have a center frequency of 800 Hz to 2.5 KHz, attenuation characteristics of 20 dB to 40 dB per octave, and the receiving audio amplifier having a voltage gain of 20 db to 26 dB.

In addition, the Internet phone relay device according to the present invention, a telephone connection port that can be connected to a general telephone network; A telephone switch intercepting a signal between the telephone connection port and the handset connecting portion; And a web switch for controlling a signal between the handset connecting portion and the computer connection port.

With this configuration, you can not only make Internet phone calls as needed, but also make phone calls using a general telephone network, so you don't need a separate phone call device. There is an advantage to that. Furthermore, by providing jacks of ordinary telephones and telephone jacks dedicated to the Internet, they can be selectively used simply, thereby providing convenience.

Here, it is preferable to open and close the phone switch and the web switch in conjunction with each other.

Hereinafter, an internet phone relay apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.

2 is a block diagram of the Internet phone repeater when using the Internet phone repeater according to an embodiment of the present invention, FIG. 3 is a block diagram of the Internet phone repeater of FIG. 2, and FIG. The block diagram of the circuit which comprises a part is shown. Here, the same reference numerals as those shown in each drawing refer to the same member having the same function.

2, the Internet phone relay device 150 according to the present invention, the telephone connection port 151 is connected to the telephone line 111 and the wired line connected to the general telephone network, the handset 120 of the telephone (HAND SET) A handset connection port 152 connected to a wired line, a headset jack 153 connected to a headset 171 (HEAD SET) for transmitting or receiving a voice signal by a user, and a computer connection cable 180 A computer connection port 154, a volume controller 155 for adjusting the volume of an incoming sound during an internet phone call, and a web switch for switching the handset 120 or the headset 171 to make an internet phone call 156, a telephone switch 157 for switching the handset 120 or the headset 171 to be connected to a general telephone network so that a call can be made, and for receiving when the voice of the receiver cannot be heard when making an Internet call.A loud switch 158 is provided to increase the gain of the audio amplifier (see reference numeral 230 in FIG. 4).

The computer connection cable 180 is connected to the microphone input terminal 193, the speaker output line terminal 194, and the USB port 195 of the sound card 192 of the computer 190, respectively.

In the Internet phone relay device 150 according to the present invention, when using the handset 120 or the headset 171 as a general telephone, the telephone switch 157 is turned on (ON) and at the same time the web switch ( When the telephone 156 is turned off and the user wants to make an Internet phone call, the telephone switch 157 is turned off, and the telephone switch is made while the web switch 156 is turned on. In this case, it is preferable that the telephone switch 157 and the web switch 156 interlock with each other.

First, a case in which the handset 120 or the headset 171 is to be used as a general telephone will be described with reference to FIGS. 2 and 3 as follows. Here, for convenience of explanation, the calling party is called a transmitting party, and the other party receiving a call is called a receiving party.

Referring to FIG. 3, when the caller makes a call while only the telephone switch 157 is turned on, a voice signal is converted into an electrical signal through the handset 120 or the handset of the headset 171. Enters the phone 110 and transmits through the general telephone network (PSTN). The signal sent from the receiving side is output from the telephone 110 and passes through the telephone switch 157 to the handset 120 or the handset of the headset 171 to convert the electrical signal into a voice signal.

Therefore, when the handset 120 or the headset 171 is used while only the telephone switch 157 is turned on, since the call is made through a landline call through a general telephone network, the computer 190 may be connected to a wired call. Independent circuits can be configured to make calls without being affected by the general telephone network.

Here, in order to listen to the stereo signal from the sound card 192 of the computer 190, for example, music, the Internet phone relay device according to the present invention is a sound card 192 as shown by the reference numeral 'S' in FIG. It may further include a speaker-out jack connected to the output line terminal 194 of the). The speaker-out jack may use one of the headset jacks 153 of the headset 171.

Next, a case where the user wants to make an internet phone call with the handset 120 or the headset 171 will be described with reference to FIGS. 2 to 4.

In the case of using an Internet telephone call, when the volume of the wave increases in the volume control of the wave device 192a of the sound card 192 of the computer 190, the transmitting voice signal and the receiving voice signal simultaneously increase, so that the feedback of the signal Noise, such as howling, occurs due to feedback. Therefore, the wave volume of the wave device 192a of the sound card 192 of the computer 190 connected to the Internet phone relay device 150 according to the present invention should be reduced to reduce the feedback by adjusting the wave signal to be smaller. Here, when the wave volume is reduced in the wave device 192a of the sound card 192 of the computer 190, the receiving side signal and the transmitting side signal of the sound card 192 are also reduced.

In such a state, when only the web switch 156 is turned ON and the call is made, the voice signal is converted into an electrical signal through the handset 120 or the handset of the headset 171 to pass through the noise removing unit 200. do.

Referring to FIG. 4, the noise removing unit 200 amplifies a signal input from the handset 120 or the headset 171 through the first input terminal 152a of the handset connecting unit 250 to connect the computer port. Among the signals input from the transmission microphone amplifier 210 sent to the wave device 192a through the first output terminal 154b of 154 and the second input terminal 154a of the computer connection port 154, Band filter assembly 220 for passing only the band frequency and the signal from the band filter assembly 220 to amplify the handset 120 through the second output terminal 152b of the handset connecting unit 250 Or a receiving audio amplifier 230 for transmitting to the handset of the headset 171, a volume controller 155 provided between the band filter assembly 220 and the receiving audio amplifier 230, and Loudness to increase the gain of the receiving audio amplifier 230 And a location (240). Here, the handset means connection unit 250 refers to a connection port for transmitting or receiving a voice signal, such as a handset connection port 152 or a headset jack 153.

The electric signal of the transmitter passing through the noise removing unit 200 is amplified by a predetermined signal, for example, 3 to 10 dB in the transmitting microphone amplifier 210 to be transmitted to the sound card 192 of the computer.

The voice signal of the receiving side passes through the band filter assembly 220 through the sound card 192 of the computer 190. The band filter assembly 220 is for preventing amplification of various noises received from the computer. For example, the center frequency is adjusted from 800Hz to 2.5KHz and has attenuation characteristic of 20dB to 40dB per octave.

The weak electric signal emitted through the band filter assembly 220 is a larger electric signal through the receiving audio amplifier 230 through the volume controller 155, for example, to have a voltage gain of 20dB to 26dB. It should be able to provide enough audio output to

In addition, the loud switch 240 (LOUD SWITCH) may increase or decrease the volume of the receiving side depending on the type of the sound card 190 of the computer. Thus, the gain of the receiving audio amplifier 230 is an example. In this case, the gain at the time of OFF of the loudspeaker switch 240 is 20 dB, and the gain at the time of ON is 40 dB.

The signal output from the receiving audio amplifier 230 is converted into a voice signal through the handset of the handset 120 or the headset 171 to enable a call.

As described above, according to the Internet phone repeater according to the present invention, the feedback microphone is reduced by the transmitting microphone amplifier and the receiving audio amplifier to reduce noise such as howling, and the band filter assembly can reduce other computer noise. Because it can be minimized, the call quality improves when making Internet phone calls. In addition, the reliability of the telephone call is improved by adjusting the volume of the voice in the Internet telephone call using the volume controller and the loudspeaker. Furthermore, the user can use the Internet phone more easily and conveniently since the user can use the jack which can use the existing general computer interface and the handset of the general telephone as it is. Therefore, when accessing a free Internet phone service using an Internet phone relay device and a regular phone according to the present invention, not only the call quality is maintained but also the connection work is simple and convenient, so that the user can reduce the communication cost according to the Internet phone call. And free internet phone service providers will be able to offer greater revenue products.

Claims (6)

Handset means comprising a handset for converting a voice signal into a first electrical signal and a handset for converting a second electrical signal into an audible signal; An apparatus for use in an internet telephony service system comprising: a sound card of a computer including a wave device for converting an analog signal and a digital signal to each other while the first electric signal and the second electric signal are passed. A first input terminal of a handset connecting means for receiving the first electrical signal; A first output terminal of the computer connection port electrically connected to the first input terminal; A transmission microphone amplifier for amplifying the first electrical signal from the first output terminal and outputting the amplified signal to the computer connection port; A second input terminal of a computer connection port through which the second electrical signal is received: A second output terminal of a handset input terminal electrically connected to the second input terminal; And a receiving audio amplifier for amplifying the second electrical signal coming from the second input terminal and outputting the second electrical signal to the second output terminal. The method of claim 1, And a band filter assembly configured to pass a predetermined band frequency between the second input terminal and the receiving audio amplifier. The method of claim 2, A volume controller for adjusting a magnitude of the second electrical signal passing through the band pass filter assembly; And a loudspeaker switch for increasing the gain of the receiving audio amplifier. The method of claim 2, The transmitting microphone amplifier is amplified by 3 to 10dB, The band filter assembly has a center frequency of 800 Hz to 2.5 KHz and attenuation characteristic of 20 dB to 40 dB per octave, And the receiving audio amplifier has a voltage gain of 20db to 26dB. The method of claim 3, wherein Telephone connection port which can be connected to a general telephone network; A telephone switch intercepting a signal between the telephone connection port and the handset connecting portion; And And a web switch for controlling a signal between the handset connecting portion and the computer connection port. The method of claim 5, The telephone switch and the web switch Internet phone relay device, characterized in that the opening and closing in conjunction with each other.